Function fxFunctionExpression

xs/sources/xsSyntaxical.c:2907–2953

}

void fxFunctionExpression(txParser* parser, txInteger theLine, txSymbol** theSymbol, txUnsigned flag)
{
	txUnsigned flags = parser->flags;
	parser->flags = (flags & (mxParserFlags | mxStrictFlag)) | mxFunctionFlag | mxTargetFlag | flag;
	if ((parser->states[0].token == XS_TOKEN_IDENTIFIER)
			|| ((flags & mxGeneratorFlag) && !(flags & mxStrictFlag) && (parser->states[0].token == XS_TOKEN_YIELD))
			|| ((theSymbol == C_NULL) && (parser->states[0].token == XS_TOKEN_AWAIT))) {
		fxPushSymbol(parser, parser->states[0].symbol);
		if (theSymbol)
			*theSymbol = parser->states[0].symbol;
		fxCheckStrictSymbol(parser, parser->states[0].symbol);
		fxGetNextToken(parser);
	}
	else
		fxPushNULL(parser);
	fxParametersBinding(parser);
	if (parser->states[0].token == XS_TOKEN_HOST) {
		fxGetNextToken(parser);
		if (parser->states[0].token == XS_TOKEN_STRING) {
			fxPushStringNode(parser, parser->states[0].stringLength, parser->states[0].string, theLine);
			fxGetNextToken(parser);
		}
		else {
			fxReportParserError(parser, parser->states[0].line, "invalid host function");
			fxPushNULL(parser);
		}
		fxPushNodeStruct(parser, 3, XS_TOKEN_HOST, theLine);
        parser->root->flags = parser->flags & (mxStrictFlag | mxNotSimpleParametersFlag | mxTargetFlag | mxArgumentsFlag | mxEvalFlag | flag);
        if (!(flags & mxStrictFlag) && (parser->flags & mxStrictFlag))
            fxCheckStrictFunction(parser, (txFunctionNode*)parser->root);
        parser->flags = flags;
	}
	else {
		fxMatchToken(parser, XS_TOKEN_LEFT_BRACE);
		fxBody(parser);
		fxPushNodeStruct(parser, 1, XS_TOKEN_BODY, theLine);
		fxPushNodeStruct(parser, 3, XS_TOKEN_FUNCTION, theLine);
        parser->root->flags = parser->flags & (mxStrictFlag | mxNotSimpleParametersFlag | mxTargetFlag | mxArgumentsFlag | mxEvalFlag | flag);
        if (!(flags & mxStrictFlag) && (parser->flags & mxStrictFlag))
            fxCheckStrictFunction(parser, (txFunctionNode*)parser->root);
        if (parser->flags & mxNativeFlag) {
        	fxCheckNativeFunction(parser);
        }     
       	parser->flags = flags;
        fxMatchToken(parser, XS_TOKEN_RIGHT_BRACE);
	}
}

void fxGeneratorExpression(txParser* parser, txInteger theLine, txSymbol** theSymbol, txUnsigned flag)
{